Volume 43, Issue 6 pp. 1137-1143
Research Article

Additive-Induced Selective Crystallization of the Elusive Form-II of γ-Aminobutyric Acid

Lingyu Wang

Lingyu Wang

Tianjin University, School of Chemical Engineering and Technology, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

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Weiwei Tang

Weiwei Tang

Tianjin University, School of Chemical Engineering and Technology, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

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Shichao Du

Shichao Du

Tianjin University, School of Chemical Engineering and Technology, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

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Songgu Wu

Songgu Wu

Tianjin University, School of Chemical Engineering and Technology, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

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Junbo Gong

Corresponding Author

Junbo Gong

Tianjin University, School of Chemical Engineering and Technology, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, No. 92 Weijin Road, Nankai District, 300072 Tianjin, China

Correspondence: Junbo Gong ([email protected]), Tianjin University, School of Chemical Engineering and Technology, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China.Search for more papers by this author
First published: 16 April 2020
Citations: 5

Abstract

The impact of two structural factors of sodium carboxylate additives on their ability to induce the selective crystallization of γ-aminobutyric acid (GABA) Form-II was investigated, namely, the number of –COO groups and the types of R groups (chain alkyl, cyclic alkyl, or phenyl). It was found that the increase of –COO groups caused the additives lose their inducing ability. This may be attributed to the fact that the increment of hydrophilic –COO groups results in enhanced solvation and steric effect of additives, which makes additives unable to interact with GABA effectively. Additives with different R groups all can induce Form-II but they exhibited varying inducing abilities. This could be due to the distinct results of competition between the attachment and detachment of different additives on the GABA growth end.

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